Got Sql Error in Syntax and need efficient sql query - mysql

Question

As per my requirement i made the below query. Now it not working.
Query is:
SELECT *
FROM T_INV_DTL T
LEFT JOIN (
SELECT inv_dtl_id,
Employee_id AS emp_id,
GROUP_CONCAT(DISTINCT Employee_id) AS Employee_id
FROM T_INV_INVESTIGATOR
GROUP BY
inv_dtl_id
)TII
ON T.inv_dtl_id = TII.inv_dtl_id
JOIN T_INVESTIGATION TI
ON T.inv_id = TI.inv_id
LEFT JOIN (
SELECT inv_dtl_id
FROM T_INV_BILL
GROUP BY
inv_dtl_id
)TIB
ON T.inv_dtl_id = TIB.inv_dtl_id
JOIN T_Insurance_company TIC
ON TI.client_id = TIC.ins_cmp_id
WHERE 1 T.Report_dt != '0000-00-00'
AND (
T.inv_dtl_id NOT IN (SELECT inv_dtl_id
FROM T_INV_BILL TIBS
WHERE TIBS.inv_dtl_id NOT IN (SELECT
inv_dtl_id
FROM
T_INV_BILL
WHERE
Bill_submitted_dt =
'0000-00-00'))
)
ORDER BY
Allotment_dt DESC
LIMIT 20
Can anyone tells the problem and can you please modify to more efficient query(Suppose if we have more than 100 records, then we take the count for it for pagination it should be give faster).
T_INV_DTL is main table and it connect to others. So my probelm is each entry of this table T_INV_DTL has multtiple investigation bill in the table T_INV_BILL. Report_dt in the T_INV_DTL. So my outcome is that i need result if there’s a report date in T_INV_DTL and not atleast one bill date in T_INV_BILL.
I need the result with both if there’s a report date in T_INV_DTL and not atleast one bill date in T_INV_BILL(If all have entered the bill submitted date it does not need it).

Answer 1

While I admittedly don't know what issues you're having (please provide addl info), your query does look like it could be optimized.
Removing your Where criteria and adding to your Join should save 2 of your table scans:
SELECT *
FROM T_INV_DTL T
LEFT JOIN (
SELECT inv_dtl_id,
Employee_id AS emp_id,
GROUP_CONCAT(DISTINCT Employee_id) AS Employee_id
FROM T_INV_INVESTIGATOR
GROUP BY
inv_dtl_id
)TII
ON T.inv_dtl_id = TII.inv_dtl_id
JOIN T_INVESTIGATION TI
ON T.inv_id = TI.inv_id
LEFT JOIN (
SELECT inv_dtl_id
FROM T_INV_BILL
WHERE Bill_submitted_dt != '0000-00-00'
GROUP BY inv_dtl_id
)TIB
ON T.inv_dtl_id = TIB.inv_dtl_id
JOIN T_Insurance_company TIC
ON TI.client_id = TIC.ins_cmp_id
WHERE T.Report_dt != '0000-00-00'
AND TIB.inv_dtl_id IS NULL
ORDER BY
Allotment_dt DESC
LIMIT 20